Latest Customer Reviews

K&N Air Filters Reviews

I recently replaced my factory air filter with this K&N air filter, because I figured it couldn't hurt to try and squeez a little more horsepower out of my car. I could immediately tell the difference going up hills, and accellerating quickly on freeways. No more lag when I hit the gas.

K&N Air Filters Reviews

I recently replaced my factory air filter with this K&N air filter, because I figured it couldn't hurt to try and squeez a little more horsepower out of my car. I could immediately tell the difference going up hills, and accellerating quickly on freeways. No more lag when I hit the gas.

Not sure which 2004 Scion xB Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:

"I recently replaced my factory air filter with this K&N air filter, because I figured it couldn't hurt to try and squeez a little more horsepower out of my car. I could immediately tell the difference going up hills, and accellerating quickly on freeways. No more lag when I hit the gas." —Jennifer B from San Diego, CA bought a K&N Air Filters for a 2004 Scion xB.

"K&N says it all. Outstanding filter. Anything from K&N is nothing but quality. I was really impressed with AutoAnything... Filter was at my door the day after I ordered it.... WOW!!!!!" —Michael C from Pomfret, MD bought a K&N Air Filters for a 2004 Scion xB.